JPS6344091A - Door latch for car - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Description: TECHNICAL FIELD This invention relates to vehicle door latches, and more particularly to an improved fork bolt type vehicle door latch.

Technical background Fork bolt type door latch
-type vehicle door l*tche)
is well known and has been used for many years. SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved door latch.

SUMMARY OF THE INVENTION The door latch according to the present invention has several features.

First, the door latch of the present invention has a synthetic resin housing member with open sides for receiving the parts of the latch during the stacking process. This facilitates the assembly of the housing member and the latch part, since the housing member can be held in the same horizontal position during the assembly operation of the housing member and the latch part.

Second, the frame part covers the open sides of the plastic housing member. the frame member is seated on the recessed shelf portion of the housing member;
When unassembled, it forms a substantially sealed latch housing. There will only be an outlet in the latch housing for the operating lever of the latch and an opening for receiving the striker that engages the fork-type latch bolt. Such a substantially sealed latch housing greatly reduces water ingress and the associated sealing and lubrication problems.

Third, the front portions of the frame member and the synthetic resin housing are coplanar to facilitate mounting of the unassembled door latch to a door component such as a door beam or door latch control module or to the wall of a vehicle body door.

Fourth, the operating levers, including the locking lever and the unlatching lever, are positioned at the bottom of the latch housing. This allows the latch to be used on the front and rear doors of a vehicle without the need for additional auxiliary levers.

Fifth, the frame member and the housing member are assembled together by a plurality of cylindrical bushings set within respective recesses of the housing member and engaging the frame member. The bushing is hollow and internally threaded to accept the bolt that secures the latch to the door. Some of the bushings act as pivots for the latch bolt and detent.

Sixth, one of the bushings is set adjacent to the shoulder of the detent so that the flange of the bushing and the frame member hold the detent and bolt shoulder together when the shoulders are in latching engagement with each other. Hold between them. This prevents the detent and bolt shoulder from bypassing each other.

Seventh, the door latch is intended for use with a loop-type striker. The striker's bight portion has a molded synthetic resin wedge that engages the wedge surface of the housing to prevent relative movement between the door and the vehicle body when the door is in the latched position. to prevent Since the legs of loop-type strikers that are engaged by the bolt are not covered, the bolt throat that receives such legs is of minimum size, increasing the strength of the door latch and reducing its size and weight. .

EXAMPLES Hereinafter, the present invention will be explained in detail based on examples shown in the accompanying drawings.

As can be seen in FIGS. 1, 2, 4, and 7, the door latch 10 according to the present invention has a one-piece molded synthetic resin housing member 12, which has a housing member 12 on one side thereof. That is, it is open at the outer base wall and has a relatively thin peripheral wall 1 along both sides and the upper and lower walls thereof.
4 and an adjacent inner first base wall portion 16, all of which are coplanar. The cover frame member 18 has an inwardly recessed lower corner portion 20 and a side flange 22.

A frame member 18 is fitted within the peripheral wall 14 and abuts the wall portion 16, closing the open base wall of the housing member 12. Three bushings 24, 26, 28 and a stud 30 extend between the hinge member 12 and the frame member 18, and the bushings are flanged in their intermediate portions and are internally threaded. As best shown in FIGS. 2 and 7, housing member 12 has three cylindrical openings 32, each of which receives an elongated cylindrical portion of bushing 24, 26, 28. There is. A first opening 32 for the bushing 24 opens into a second recess 34 in the housing member 12 . The first opening 32 is surrounded by a circular recess 36 that receives a flange 38 of the bushing 24. Recess 36 positions flange 38 in a common plane with wall portion 34. An arcuate groove 40 partially surrounds the recess 36.

Flange 38 of bushing 26 is received within a circular recess 42 about second opening 32 and is flush with an extension of wall portion 34, as shown in FIG. The flange 38 of the bushing 28 abuts the free end of a cylindrical portion 44 of the housing member 18, which cylindrical portion extends outwardly from an inwardly recessed third base wall portion 46 and extends outwardly from a third inwardly recessed base wall portion 46. It forms a part of the opening 32. Cylindrical part 4
The free end of 4 is recessed relative to the wall portion 34, and the flange 38 of the bushing 28 is in the same plane as the wall portion 34 and also in the same plane as the flange 38 of the bushing 24.26.

A cylindrical recess 48 surrounds the base of the cylindrical portion 44 and has an elongated portion 50. The fourth inwardly recessed base wall portion 52 of the housing member 12 is connected to the stud 30.
It has an opening 52 for receiving. The head of the stud and the shoulder portion adjacent thereto are received within a similarly shaped recess 54 in the housing 12 as shown in FIG.

Wall portion 52 extends 56 through side walls of housing member 12.
open outwards. The frame member 18 rests on the free ends of the short cylindrical sections of the bushings 24, 26, 28 and is bored with an opening in alignment with the internal threads of the bushings. The free end of the stud 30 extends through an opening in the corner portion 20 of the frame member and is headed as shown in FIG.
and /% housing member 12 are fixed.

A seven oak type bolt 58 is pivotally attached to a short cylindrical portion of bushing 24, as shown in FIG. bottle 6
0 extends inwardly from the bolt and supports one end of a spring 62 received within the groove 40. The other end of the spring is
It engages end wall 64 of groove 40 and biases bolt 58 to force the bolt clockwise from the fully latched position of FIG. 1 toward the unlatched position of FIG. .

The outer leg 66 of the bolt 58 connects the peripheral wall 14 and the wall portion 3.
4 and sets the bolt 58 in the unlatched position against the biasing force against the spring 62.

A detent 70 is pivotally mounted over the short cylindrical portion of bushing 28. A torsion spring 72 is set around the cylindrical portion 44 within the recess 48 .

One end 74 of the spring is engaged with the extension 50, and the other end 76 is engaged under the detent 70, causing the detent to rotate counterclockwise as viewed in FIGS. 1, 4, and 5. direction toward the stop position. The detent is set in this position against the biasing force of spring 72 by engagement of its rubber bumped leg 80 with a short cylindrical portion of bushing 26. The detent 70 has a shoulder 82 that engages a shoulder 84 on the inner leg of the throat 86 of the bolt 58 shown in FIG. It can be placed in a certain position. Although not shown in the drawings, the shoulder 82 of the detent is connected to the other shoulder 88 of the port.
The bolt can also be engaged with the bolt to place it in an intermediate latched position.

An intermittent member 90 is pivotally attached to detent 70 at 92 and is in relation to the detent.

The intermittent member has a lower portion 94 and an arcuate slot 96.

As shown in FIG. 2, the stud 30 is connected to the housing member 1
2 and the corner portion 20 of the frame member 18, connecting them to each other and spaced them together with the bushings 24, 26, 28. The stud 30 also serves to attach the outer operating lever 98, the transmission lever 100° locking lever (-102), and the key cylinder lever 104. A cylindrical bushing 106 is mounted around which is mounted a coil torsion spring 108. One end 110 of the spring 108 is attached to the transmission lever 10.
0 (FIG. 6), and the other end 112 of the spring abuts against the wall portion 114 of the housing member 12, biasing the transmission lever counterclockwise as viewed in FIG. Locking lever 102 has a first pin 116 that is received within arcuate slot 96 of intermittent member 90 . In addition, the same locking lever is attached to the second bin 1.
18, the bin has a key cylinder lever 104
is received within the expansion slot 120 of the.

As best shown in FIGS. 6 and 7, the lever 98 is connected to the tab 1 above the outer end 124 of the transmission lever 100.
22, the lever 98.100 is operated by the lever 9.
They are interconnected by clockwise movement of 8.

Locking lever 102 is shown in FIG. 1 in the unlocked position with its pin 116 adjacent the lower end of arcuate slot 96 of intermittent member 90.

In this position of the locking lever, the intermittent member is in the engaged position and the tab 94 of the intermittent member is in the transmission 1//(-1
00 end 124. Locking lever 102
When in the locked position shown in FIG. 5, it is located counterclockwise as viewed in FIG. In the disengaged position, the intermittent member 100 is not under the one end 124 of the transmission lever 100. The free end of the operating lever 98 is conventional, such as a pull-type or paddle-type outer handle that rotates the lever 98 clockwise about the stud 30 by manual operation by the operator. It is connected to a manual operation member. Clockwise movement of lever 98 causes one end 1 of lever 100 to
Tab 122 engaging 24 rotates transmission lever 100 clockwise. As one end 124 of lever 100 engages tab 94 of intermittent member 90, intermittent member 90 is displaced downwardly as viewed in FIG. 1, moving buten 70 to the released position shown in FIG. This releases bolt 58 and moves it to the unlatched position shown in FIG. When the intermittent member 90 is in the uncoupled position shown in FIG.
is bypassed to maintain detent 70 in the stopped position.

The spring 108 and tab 122 cause the free end of the operating lever to rest against the upper end of the right-hand opening 56 of the housing, as viewed in FIG.
Rub.

A key cylinder lever 104 is connected to the outer key cylinder in a conventional manner and moves the locking lever 102 between the slot 120 and the bin 118 between the unlocked position shown in FIG. 1 and the locked position shown in FIG. movement by engagement.

As shown in FIGS. 1, M4, and 5, the key cylinder lever 104 and the outer operating lever 98 extend outside the housing member through openings 56 on opposite sides of the housing member.

As shown in FIGS. 1, 3 and 7, an inner locking lever t<-126 is pivotally attached to side flange 22 of frame member 18 at point 128. As shown in FIGS. An over-center type hairpin spring 130 is suspended between the flange 22 and the lever 126 to place the lever in the unlocked position shown in solid lines in FIG. 3 or in the locked position shown in broken lines in FIG. Lever 126 is conventionally connected to an inner lock operator, such as a vertically reciprocatable garnish button or a linearly displaceable slide button. The lever 126 has a leg 132 that fits into the notch 1 of the locking lever 102.
34 and movement of the lever 126 between the locked and unlocked positions does not move the locking lever 102 to the corresponding locked and unlocked positions. Pin 118 extends into an opening 135 shown in FIG. 7 in corner portion 20 of flange member 18. Engagement of the upper and lower edges of the aperture 135 with the bin forces the lever 102 into the locked and unlocked positions under the biasing force of the spring 130.

An internally operated remote lever 136 is pivotally mounted to flange 22 at 138. The lever has a leg 140 (FIG. 3) below the transmitting/<-100 end 142. Lever 136 is connected to an inner operator, such as an inner handle. By this operation by the inside operator, the lever 136 can be rotated counterclockwise as seen in FIG. Engagement of the foot 140 with the end 142 of the transmission lever rotates the transmission lever 100 clockwise, as viewed in FIG. 1, against the spring 108, releasing the detent 70 as previously described; Allow bolt 58 to move to the unlatched position.

Release of detent 70 through operation of outer operating lever 98 occurs independently of movement of inner lever 136, and similarly, release of detent 70 by inner operating lever 136 occurs independently of movement of outer lever 98. The locking lever 102 is moved between the locked and unlocked positions through operation of the key cylinder lever 10.4 or the inner locking lever 126. When the locking lever /<-102 is moved by the inner locking lever 126, the bin 118 engages the upper end of the slot 120. Pin 11 in slot 120 of lever 104
8, the locking lever 126 remains stationary when the locking lever 102 is moved.

Loop-type striker 144, best shown in FIGS. 7 and 8, has a pair of legs 146 that are attached to a mounting plate 148 in a conventional manner. As shown in FIG. 2, the bite portion 150 of the striker 144 is partially flattened on both sides, and a synthetic resin wedge 152 is molded onto the bite portion 150 by a normal molding operation.

As best shown in FIG. 7, housing member 12 includes:
There is a recess 154 extending from wall portion 34 to a fifth base wall portion 156 recessed inwardly of housing member 12 . The L-shaped rubber bumper 158 is located in the recess 15
It is fitted within 4. The metal plate 160 is
It is attached to the long legs of the rubber bumper. Metal plate 160 cooperates with wall 162 to form a throat within housing member 12 between second base wall portion 34 and fifth pace wall portion 158 . Frame member 18
has a throat that is aligned with the throat of housing member 12. The shape and dimensions of the frame member throat are the same as the shape and dimensions of wedge 152.

When the latch 10 is attached to a vehicle door, the frame member 18 abuts the free swinging end wall 166 of the door (FIG. 2) and the flange 22 extends along the inside door panel. The frame member throat 164 is aligned with a throat 168 in the end wall 166 and the inside panel of the door. Frame member 18 has an aperture 170 that aligns with an aperture 172 in end wall 166 and an aperture in bushings 24, 26, 28, as shown in FIG. Headed securing members in the form of bolts 174 extend through the so aligned openings and engage the threads of the bushings to attach the latch IO to the door and secure the housing member 12 to the frame member 18. Bolt 174 strengthens latch 10 by applying a compressive force through member 12.18 through the bushing, and also strengthens detent 70 and the pivot of bolt 58 by increasing the strength of the bushing. The corner portion 20 of the frame member 18 defines a receptacle for the head of the stud 30, as shown in FIG. A mounting plate 148 of the striker 144 is secured to the body pillar wall to position the wedge 152 within the throat within the housing member 12 and within the passageway of the throat 168, aligning the striker leg 146 with the throat 164,168. ing.

Referring to FIG. 4, when the door is closed, the leg 146 of the striker 144 is engaged with the rear outer edge of the throat 86 of the bolt 58, moving the bolt from the position shown in FIG. 4 to the position shown in FIG. Rotate counterclockwise toward position. During this movement from the unlatched position to the latched position, the detent shoulder 82 engages the shoulder 88 , and then, under the biasing force of the spring 72 , the shoulder 84 . When the bolt moves from the unlatched position to the latched position, the striker leg 146 enters the bolt throat 8G and the rubber bumper 15
8 and partially compresses it. Wedge 1
52 is molded only over the bite portion 150 of the striker 144, the bolt throat 86 can be of minimum width, increasing the strength of the bolt without increasing its size. This allows the latch IO to be made to the minimum size.

Wedge portion 152 of striker 144 wedges into metal plate 160 and wall 162 to partially compress the long leg of bumper 158 . This allows the bolt 58
prevents the door from moving up and down relative to the body when the door is in the latched position.

As shown in FIG. 1, when bolt 58 is in the latched position, bolt shoulder 84 and detent shoulder 82 are located between seven-lem member 18 and flange 38 of bushing 26; The shoulders are held in between to prevent them from bypassing each other relative to each other under load. Bolt 174 holds seven-rung member 18 tightly against bushing 26 and holds bushing 26 and member 12.
Increase the strength of 18.

From the above explanation, the housing member and frame member are
It will be appreciated that once the bushings 24, 26, 28, studs 30 and bolts 174I are assembled, the latch components can be stored in a substantially sealed manner. Openings in such a housing include 164.16B for entry and exit of the striker 144;
56 as an outlet for the outer operating lever 98 and the key cylinder lever 104 only. The frame and housing members are secured together only by the studs 30 when the latch 10 is first assembled. Bolt 174 strengthens bush 24.2B and latch 10 when latch 10 is attached to the latch pillar surface of vehicle door 10 as shown in FIG. (These bushings form the pivot of bolt 58 and butens 1-70.) Bolt 174 also serves to attach latch 10 to a door beam or, specifically, to a door latch control module shown at 176 in FIG. This can be done easily.

All parts of latch 10 can be assembled by stacking them through the open base wall of housing member 12.

Therefore, it can be easily assembled. Because the operating lever is located near the bottom of the latch 10, the latch 10 can be used equally for both rear and front doors.

The present invention provides an improved fork bolt type vehicle door latch.

[Brief explanation of the drawing]

Figure 1 is a partially exploded sectional view of the door latch in the unrotted state and the latch bolt in the rolled state; Figure 2 is a view taken along line 2-2 in Figure 1; Figure 3 is , a view taken along line 3-3 in Figure 1; Figure 4 is a view similar to Figure 1, with the bolt in the unrotated state; Figure 5 is similar to Figure 1. Figure 7 is an exploded perspective view; Figure 8 is a perspective view of the latch striker. 12-m-housing member; 18-11 frame member; 26--push; 58-11 latch port; 70-11 detent.

Claims (1)

[Scope of Claims] 1. A housing member adapted to be closed by a cover member, which is attached to the housing member so as to be movable between a latched position and an unlatched position, and has a latched shoulder. A vehicle door latch comprising: a housing member having a latch bolt; a detent mounted to the housing member so as to be movable between a locked position and a released position relative to the latch bolt; , the housing member is a synthetic resin housing member (12
), and the housing member is attached to the inner base wall (3
4, 46), the upper and lower end walls (14), the side walls (14), the open outer base wall, and the side walls (14) and end walls of the housing member (12). Shelf part (16
); the cover member has a housing member (
12) a frame member (18) supported on the shelf portion (16) over the open outer base wall of the frame member (12);
a frame member (32) set within a recess (32) in an inner base wall (34) of the housing member (12), engaging said frame member (18) and covering the open outer base wall of the housing member (12); Bush (26) supporting 18)
a bushing (26) having an intermediate flange (38) set on the inner base wall (34) and spaced apart from the frame member (18); It has a shoulder (82) which, when in the locked position, engages the shoulder (84) of the latch bolt (58) to hold the latch bolt (58) in the latched position. The shoulders (82, 84) of the engaged latch bolt (58) and detent (70) are positioned between and overlapped by the bushing (26) and frame member (18). , a vehicle door latch characterized in that the shoulders are prevented from laterally bypassing each other relative to each other under load. 2. In the vehicle door latch according to claim 1, the bush (26) has a female thread, and the head fixture (174) is threadedly engaged with the female thread to form the frame member (18). is fixed to the outer portion of the housing member (26), such that the frame member (18) is secured to the outer portion of the housing member (26).
26) A vehicle door latch designed to prevent movement relative to the vehicle door latch. 3. In the vehicle door latch according to claim 1 or 2, a plurality of bushes (
24, 26, 28), each push seated in a recess (32) provided in the inner base wall (34, 46) of the housing member (12); Frame members (1) covering the open outer base wall
8) and an inner base portion (34, 46) that engages the frame member (18) for additional support.
said latch bolt (58) is mounted on an outer portion of one of said bushings (24) and said latch bolt (58) has an intermediate portion seated thereon and spaced apart from said frame member (18); (70) is mounted on the other one outer portion of the bushing (28) and the headed fixture (1
74) are each threadedly engaged with the bushings (24, 26, 28) to clamp the frame member (18) against the outer portion of each bushing and to prevent movement of the frame member (18) relative to the bushing. vehicle door latch. 4. In the vehicle door latch according to claim 1, 2 or 3, the housing member (12)
A generally elongated V-shaped throat (
160, 162), the throat opening laterally through the outer base wall of the housing member and opening at the wide end through one of the side walls (14) of the housing member (12). tapered generally planar walls (160, 162) having a throat extending between an inner base wall (34) of the housing member (12) and an outer base wall of the housing member (12); and a striker (144) associated with the latch.
), and the striker has a bit part (15
0), and a synthetic resin wedge member (152) is molded on the bite part (150).
a bite portion (150) and at least one leg (146);
) and ends at the connection with the wedge member (
152) has a tapered, generally flat wall that generally matches the wall of the throat in the housing member (12), and the latch bolt (58) is connected to said one leg (144) of the striker (144). a bolt throat (86) having a width substantially equal to the cross-sectional dimension of the wedge member (152) of the striker (144) with the latch bolt (58) in the latched position; ) is adapted to receive said one leg (146) when said wedge member (12) is received within a throat of said wedge member (12) and said wedge member wall and throat are in mutual engagement. door latch. 5. In the vehicle door latch according to claim 4, the frame member (18) is connected to the housing member (1).
2) having an elongated V-shaped throat (164) laterally aligned with the throat of the striker (144) and having the same dimensions and shape as the wedge member (152) of the striker (144); leg (146) of striker (144) is received in bolt throat (86) and latch bolt (58) is in the latched position. A vehicle door latch adapted to extend laterally through the throat of a housing member (12). 6. In the vehicle door latch according to any one of claims 1 to 5, the housing member (12
) is provided with a shoulder stud (30) extending between the inner and outer base walls of the housing member (12) and pivotally connected to the stud (30) and adjacent the lower end wall of the housing member (12). At least one lever (98, 100, 102, 10) extending outwardly of the housing member (12) through a respective opening in the side wall (14).
4), wherein the latch housing formed from the assembly of the housing member (12) and the frame member (18) is attached to the side wall (14) of the housing member (12).
Vehicle door latches that are sealed except for their respective openings.